Syrian air force bombers have pounded a major stronghold of the ISIL terrorist group in northern Syiran town of Raqqa, reportedly killing at least 19 terrorists on the ground.

Reporting the bombing of areas occupied by the Takfiri terrorist group on Sunday, the opposition-linked Syrian Observatory for Human Rights, further said the Syrian warplanes conducted more than a dozen airstrikes against ISIL position in the town over the past 24 hours.

Director of the UK-based Observatory Rami Abdurrahman also stated that six of the Syrian air raids targeted Raqqa’s military court.

He added that at least 16 Takfiri terrorists were killed in the town, and around 40 wounded. Other reports from opposition sources in the area offered different accounts on the casualty figures.

Opposition-linked groups inside Syria further reported government airstrikes on ISIL-controlled areas in Aleppo province as well, including the towns of Akhtarin and Dabiq.

The latest developments come as Syrian army has achieved major victories in its battle against Takfiri groups across the country over the past months.

Syrian President Bashar al-Assad says the Takfiri war in his country has strongly shifted in favor of government forces as they have made continuous gains in their fight against the terrorists.

Syria has been gripped by deadly violence since March 2011. An estimated 170,000 people have reportedly been killed and millions displaced due to the violence fueled by the Western-backed militants.

The West and its regional allies, including Qatar, Saudi Arabia and Turkey, are giving financial and military support to the militants.